<template>
  <div class="todo-container">
    <div class="todo-wrap">
      <Header :addTodo="addTodo" />
      <Content
        :todoList="todoList"
        :updateTodoById="updateTodoById"
        :deleteTodoByIndex="deleteTodoByIndex"
      />
      <Footer />
    </div>
  </div>
</template>

<script>
import { nanoid } from "nanoid";
import Header from "./components/Header";
import Footer from "./components/Footer";
import Content from "./components/Content";
export default {
  name: "App",
  components: {
    Header,
    Content,
    Footer,
  },
  data() {
    return {
      todoList: [
        { id: nanoid(), todo: "吃饭", done: false },
        { id: nanoid(), todo: "睡觉", done: false },
        { id: nanoid(), todo: "打豆豆", done: false },
      ],
    };
  },
  methods: {
    //1.封装一个修改某一个todo数据选中状态的props函数
    updateTodoById(id) {
      this.todoList.forEach((item) => {
        if (item.id === id) {
          //因为展示的数据和数据中保持一致,所以把改变后的状态传递过来,或者直接对当前状态取反都可以
          item.done = !item.done;
        }
      });
    },

    //2.封装一个删除单个todo数据的props函数
    deleteTodoByIndex(index) {
      //删除一个可以是使用splice的方法删除，需要拿到下标
      this.todoList.splice(index, 1);
    },

    //3.封装一个向todo中插入数据的props函数
    addTodo(newTodo) {
      this.todoList.unshift(newTodo);
    },
  },
};
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2),
    0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}
</style>
